The circles on the map above are the postcode unit 'centriods' from Code-Point Open, under the Open Government Licence. The 'centriod' is calculated by taking the average of the coordinates of all the delivery points with that postcode, and then snapping that location to the nearest delivery point in that postcode. The data may be freely used in OpenStreetMap, but please make sure you understand it first. Also please only add postcodes to objects representing addressable entities; do not add the postcode centroids as themslves. Suggested source tag code-point_open
The circles are coloured by whether or not there is at least one OSM object with that value in its addr:postcode tag. Click on a point to see the postcode. The numbers in brackets are the number of OSM objects with that postcode.
The centroids are the location of the nearest 'delivery point' to the arithmetic mean of the coordinates of all the delivery points within that unit. Those points with a codepoint PQI greater than 40 are excluded from the map above. (Higher values are typically not geographically accurate. In particular, PQI=50 is used for new postcodes before the location has been determined. The location given for such postcodes seems to be derived from other existing postcodes with similar units letters, which may not be close to the new postcode.)
The pale blue lines from the circles join each Code-Point Open centroid to the mean coordiantes of all the OSM objects with that postcode. (For ways an relations, the centre of the rectangular bounding box is used at the coordinates for the OSM object.) Long lines may indicate missing or incorrect OSM objects for that postcode. In particular, if all the postcodes in a givne unit are correctly mapped, the circle should be located on the nearest delivery point within that postcode to the other end of the blue line.
The OSM data for the number of objects with each unit comes from Taginfo GB. It is usually updated once a day at about 10:15 UTC, with data from about 20:30 UTC the previous day. (Current data is from 1970‑01‑01 00:00:00 Z.) The data used to compute the OSM mean position comes from the Overpass API and is updated less frequently, usually about once a week. (Current data is from 2024‑03‑23 18:50:30 Z.)
District | Sector | Units | Geo. Units | Mapped | % |
---|---|---|---|---|---|
SW1A | 2 | 76 | 76 | 37 | 48.7% |
All units within this sector:
Unit | PQI | First Seen | Last Seen | Street Name | ML | Mapped |
---|---|---|---|---|---|---|
SW1A 2AA | 10 | Downing Street | 1 | |||
SW1A 2AB | 10 | Downing Street | 1 | |||
SW1A 2AD | 10 | Downing Street | 1 | |||
SW1A 2AE | 10 | 2 | 0 | |||
SW1A 2AF | 10 | 2018‑04 | 2 | 0 | ||
SW1A 2AG | 10 | Downing Street | 4 | 1 | ||
SW1A 2AH | 10 | King Charles Street | 1 | |||
SW1A 2AL | 10 | 4 | 0 | |||
SW1A 2AN | 10 | 2 | 0 | |||
SW1A 2AQ | 10 | King Charles Street | 1 | |||
SW1A 2AR | 10 | 4 | 0 | |||
SW1A 2AS | 10 | Whitehall | 4 | 1 | ||
SW1A 2AT | 10 | 4 | 0 | |||
SW1A 2AU | 10 | Whitehall | 1 | |||
SW1A 2AW | 10 | Whitehall Place | 3 | 1 | ||
SW1A 2AX | 10 | Horse Guards Parade | 1 | |||
SW1A 2AY | 10 | Whitehall | 1 | |||
SW1A 2BA | 10 | 3 | 0 | |||
SW1A 2BB | 10 | 0 | ||||
SW1A 2BD | 10 | Whitehall Place | 4 | |||
SW1A 2BE | 10 | 0 | ||||
SW1A 2BH | 10 | 2022‑07 | 0 | |||
SW1A 2BJ | 10 | 0 | ||||
SW1A 2BL | 10 | 2 | 0 | |||
SW1A 2BN | 10 | 0 | ||||
SW1A 2BQ | 10 | Parliament Street | 2 | 3 | ||
SW1A 2BS | 10 | 0 | ||||
SW1A 2BT | 50 | 2022‑07 | 3 | 0 | ||
SW1A 2BU | 10 | 0 | ||||
SW1A 2BX | 10 | Whitehall | 2 | 5 | ||
SW1A 2BY | 10 | 2 | 0 | |||
SW1A 2BZ | 10 | 2013‑07 | 0 | |||
SW1A 2DB | 10 | Craig's Court | 1 | |||
SW1A 2DD | 10 | Whitehall | 6 | |||
SW1A 2DG | 10 | 0 | ||||
SW1A 2DL | 10 | 2 | 0 | |||
SW1A 2DR | 10 | Charing Cross | 2 | 1 | ||
SW1A 2DU | 10 | 0 | ||||
SW1A 2DX | 10 | 0 | ||||
SW1A 2DY | 10 | Whitehall | 3 | 5 | ||
SW1A 2EF | 10 | 2 | 0 | |||
SW1A 2EG | 10 | 0 | ||||
SW1A 2EH | 10 | 2 | 0 | |||
SW1A 2EJ | 10 | Whitehall Court | 9 | |||
SW1A 2EL | 10 | Whitehall Court | 2 | 6 | ||
SW1A 2EP | 10 | 2 | 0 | |||
SW1A 2ER | 10 | 0 | ||||
SW1A 2ES | 10 | 2 | 0 | |||
SW1A 2ET | 10 | Whitehall | 1 | |||
SW1A 2EU | 10 | 2015‑10 | 0 | |||
SW1A 2EX | 10 | 0 | ||||
SW1A 2EY | 10 | 2013‑07 | 0 | |||
SW1A 2FF | 10 | 2013‑07 | 0 | |||
SW1A 2GL | 10 | 5 | 0 | |||
SW1A 2HB | 10 | Horse Guards Avenue | 1 | |||
SW1A 2HD | 10 | Whitehall Place | 3 | 3 | ||
SW1A 2HE | 10 | 3 | 0 | |||
SW1A 2HJ | 10 | Great Scotland Yard | 1 | |||
SW1A 2HN | 10 | Great Scotland Yard | 1 | |||
SW1A 2HP | 10 | Whitehall | 1 | |||
SW1A 2HQ | 10 | 0 | ||||
SW1A 2HR | 10 | Victoria Embankment | 1 | |||
SW1A 2HU | 10 | Horse Guards Avenue | 2 | 6 | ||
SW1A 2HW | 10 | 2013‑07 | 0 | |||
SW1A 2HZ | 10 | Victoria Embankment | 1 | |||
SW1A 2JF | 10 | 2 | 0 | |||
SW1A 2JH | 10 | Victoria Embankment | 3 | |||
SW1A 2JJ | 10 | 0 | ||||
SW1A 2JL | 10 | Victoria Embankment | 1 | |||
SW1A 2JN | 10 | 0 | ||||
SW1A 2JR | 10 | Bridge Street | 4 | |||
SW1A 2JX | 10 | 0 | ||||
SW1A 2LG | 10 | 2015‑10 | 0 | |||
SW1A 2LW | 10 | 0 | ||||
SW1A 2LZ | 10 | 0 | ||||
SW1A 2NE | 10 | 2 | 0 | |||
SW1A 2NH | 10 | Parliament Square | 1 | |||
SW1A 2NJ | 10 | 2013‑07 | 0 | |||
SW1A 2NL | 10 | 0 | ||||
SW1A 2NP | 10 | Whitehall | 1 | |||
SW1A 2NS | 10 | 2017‑10 | 0 | |||
SW1A 2NU | 10 | 2 | 0 | |||
SW1A 2PA | 10 | 2 | 0 | |||
SW1A 2PW | 10 | 4 | 0 | |||
SW1A 2SD | 10 | 5 | 0 | |||
SW1A 2SH | 10 | 0 | ||||
SW1A 2TS | 10 | Spring Gardens | 4 | |||
SW1A 2TT | 10 | Victoria Embankment | 2 | 1 | ||
SW1A 2WA | 10 | 2018‑01 | 0 | |||
SW1A 2WB | 10 | 5 | 0 | |||
SW1A 2WH | 10 | Whitehall | 2 | |||
SW1A 2WZ | 10 | 2013‑07 | 0 | |||
SW1A 2XB | 10 | 2013‑07 | 0 | |||
SW1A 2ZF | 10 | 2013‑07 | 0 | |||
SW1A 2ZG | 10 | 2013‑07 | 0 | |||
SW1A 2ZH | 10 | 2013‑07 | 0 | |||
SW1A 2ZJ | 10 | 2013‑07 | 0 |
Units with street mismatches in this sector:
Unit | Mapped | Dominant Street | OSM Object | Tagged Street |
---|---|---|---|---|
SW1A 2BQ | 3 | Parliament␣Street | n5287535091 | Horse␣Guards␣Road |
SW1A 2DD | 6 | Whitehall | n246518042 | Craig's␣Court |
SW1A 2EJ | 9 | Whitehall␣Court | n11412462498 | Victoria␣Embankment |
SW1A 2EJ | 9 | Whitehall␣Court | n11412462497 | Victoria␣Embankment |
SW1A 2EJ | 9 | Whitehall␣Court | n11412462496 | Victoria␣Embankment |
SW1A 2EL | 6 | Whitehall␣Court | n11052803631 | Whitehall␣Place |
SW1A 2EL | 6 | Whitehall␣Court | n11052803630 | Whitehall␣Place |
SW1A 2HD | 3 | Whitehall␣Place | n11052803629 | Whitehall␣Court |
SW1A 2JH | 3 | Victoria␣Embankment | n544456208 | Bridge␣Street |
SW1A 2JR | 4 | Bridge␣Street | n4987188987 |